TBB power Solar Mate - Communication Connection; Connecting the multiple units

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MPPT charge controller User Manual
3.9 Communication Connection
 Please refer to chapter 2.2.3 for port definition.
Do not route the communication wire in the same conduit as the DC input/output cable.
3.10 Connecting the multiple units
In a multiple unit installation, each SP charge controller need to be connected to a separate PV
array. And their communication must be connected to ensure the battery is charged in correct
state.
Please make sure each SP charge controller was connected with its own PV array. The
mixing connection will cause damage which is out of warranty.
Figure 3-9 Stand-alone operation